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Finite Element Analysis of Stress Distribution in Root Canals When Using a Variety of Post Systems Instrumented with
Selen Ince Yusufoglu1, Esma Saricam2, Mahmut Sertac Ozdogan3
1Department of Endodontics, Faculty of Dentistry, Ankara Yıldırım Beyazit University, Ankara, Turkey. dtselenince@hotmail.com.
Annals of Biomedical Engineering
|January 27, 2023
Summary
This study found that fiber and titanium posts, combined with F6-Skytaper and WaveOne (WO) rotary systems, reduce stress on endodontically treated teeth, potentially preventing vertical root fractures (VRFs). These combinations offer durable restorative solutions for clinicians.
Area of Science:
- Dental Materials Science
- Biomechanical Engineering
- Endodontics
Background:
- Restorative treatments for endodontically treated teeth require durability to prevent vertical root fractures (VRFs).
- Factors like trauma and occlusal forces contribute to VRFs in root canal-treated teeth.
Purpose of the Study:
- To compare stress distribution in mandibular premolar teeth using various post designs and rotary instrumentation systems.
- To identify material and instrumentation combinations that minimize stress and enhance tooth longevity.
Main Methods:
- Six mandibular premolar teeth were instrumented with different rotary systems (ProTaper Next, WaveOne (WO), Reciproc (R), ReciprocBlue (RB), F6-Skytaper, TF-Adaptive).
- Cone beam computed tomography (CBCT) and CAD software (Catia V5R25) were used for 3D modeling.
- Finite element analysis (FEA) software (ANSYS V17.2) simulated stress distribution under oblique and vertical loading (250-N).
- Four post materials (metal, fiber, zirconia, titanium) were analyzed.
Main Results:
- Oblique loading resulted in higher maximum principal stress and von Mises values.
- F6-Skytaper and WO systems exhibited lower stress compared to others.
- TF-Adaptive instrument showed higher stress distribution.
- Fiber and titanium posts demonstrated lower stress values.
- F6-Skytaper, R, and RB instruments were most effective in minimizing crown displacement and stress.
Conclusions:
- Fiber and titanium posts offer superior stress reduction compared to other materials.
- Instrumentation with F6-Skytaper and WO systems appears to reduce the risk of root fractures.
- Optimizing post material and instrumentation choice is crucial for durable restorative treatments in endodontically treated teeth.
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